فحص التاريغ - نسخة قابلة للطباعة

كود :
   Public Shared Function GetNistTime() As DateTime

        Dim dateTime As DateTime = DateTime.MinValue



        Dim request As HttpWebRequest = DirectCast(WebRequest.Create("http://nist.time.gov/actualtime.cgi?lzbc=siqm9b"), HttpWebRequest)

        request.Method = "GET"

        request.Accept = "text/html, application/xhtml+xml, */*"

        request.UserAgent = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)"

        request.ContentType = "application/x-www-form-urlencoded"

        request.CachePolicy = New RequestCachePolicy(RequestCacheLevel.NoCacheNoStore)

        'No caching

        Dim response As HttpWebResponse = DirectCast(request.GetResponse(), HttpWebResponse)

        If response.StatusCode = HttpStatusCode.OK Then

            Dim stream As New StreamReader(response.GetResponseStream())

            Dim html As String = stream.ReadToEnd()

            '<timestamp time=\"1395772696469995\" delay=\"1395772696469995\"/>

            Dim time As String = Regex.Match(html, "(?<=\btime="")[^""]*").Value



            Dim milliseconds As Double = Convert.ToInt64(time) / 1000.0



            dateTime = New DateTime(1970, 1, 1).AddMilliseconds(milliseconds).ToLocalTime()

        End If

        Return dateTime

    End Function